Structural effects of dimensional nano-fillers on the properties of Sapium sebiferum oil-based polyurethane matrix: Experiments and molecular dynamics simulation

Xu, Xiaoling; Bo, Guangxu; He, Xin; Tian, Xiaoke; Yan, Yunjun

doi:10.1016/j.polymer.2020.122709

Cited by 12 publications

(11 citation statements)

References 38 publications

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“…This indicates that the foam powders can be both embedded and encased within the matrix. For the mBPUF, the O 1s signals are constituted by two peaks at 533.05 and 530.24 eV, which relate to a composition of C=O and C–O in the chain of the matrix [ 24 ]. The O 1s peaks of the film overlap into almost one peak.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Lightweight Renewable Microwave-Absorbing Bio-Polyurethane/Fe3O4 Composite Foam: Structure Analysis and Absorption Mechanism

Tian

et al. 2022

IJMS

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Sustainable renewable polymer foam used as a lightweight porous skeleton for microwave absorption is a novel strategy that can effectively solve the problems of the large surface density, high additive amount, and narrow absorbing band of absorbing materials. In this article, novel renewable microwave-absorbing foams were prepared using Sapiumse biferum kernel oil-based polyurethane foam (BPUF) as porous matrix and Fe3O4-nanoparticles as magnetic absorbents. The microstructure and the microwave absorption performance, the structural effects on the properties, and electromagnetic mechanism of the magnetic BPUF (mBPUF) were systematically characterized and analyzed. The results show that the mBPUF displayed a porous hierarchical structure and was multi-interfacial, which provided a skeleton and matching layer for the Fe3O4 nanoparticles. The effective reflection loss (RL ≤ −10 dB) frequency of the mBPUF was from 4.16 GHz to 18 GHz with only 9 wt% content of Fe3O4 nanoparticles at a thickness of 1.5~5 mm. The surface density of the mBPUF coatings was less than 0.5 kg/cm2 at a thickness of 1.8 mm. The lightweight characteristics and broadband absorption were attributed to the porous hierarchical structures and the dielectric combined with the magnetic loss effect. It indicates that the mBPUF is a prospective broadband-absorbing material in the field of lightweight stealth materials.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Lightweight Renewable Microwave-Absorbing Bio-Polyurethane/Fe3O4 Composite Foam: Structure Analysis and Absorption Mechanism

Tian

et al. 2022

IJMS

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“…This is because RHPU grouting materials are porous matrices that contain numerous microscale closed-cell foams and the walls are made of polyurethane. 16,18,23 RHPU grouting materials belong to the category of high-polymer, of which the strength is mainly due to the entanglement between adjacent molecular chains, 27,28 whereas soil mass is a collection of solid particles, and its strength is mainly contributed by Van der Waals force. 29 Under compression, RHPU grouting materials perform with different mechanical behavior from soil.…”

Section: Introductionmentioning

confidence: 99%

“…29 Under compression, RHPU grouting materials perform with different mechanical behavior from soil. 28,29 The stress-strain curves of RHPU grouting materials contain linear elastic stage, yield plateau stage, and strain hardening stage, 30 whereas the stress-strain curves of soil mainly contain linear elastic stage and stress declining stage. 31 Besides, the strength of the RHPU grouting materials can be different from soil.…”

Section: Introductionmentioning

confidence: 99%

Study of the mechanical properties and constitutive model of the roadbed rehabilitation polyurethane grouting materials under uniaxial compression

Fang

Zheng

et al. 2022

J of Applied Polymer Sci

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Polyurethane grouting materials are increasingly used in the non-excavation rehabilitation of roadbeds. The compressive strength of roadbed rehabilitation polyurethane (RHPU) grouting materials is the key to achieving the desirable repair effect, whereas the constitutive model of RHPU grouting materials is not yet understood. Here, the mechanical properties of RHPU grouting materials under compression were experimentally investigated, followed by establishing the hyperfoam constitutive model. The variation laws of the critical parameters in the model with density were function fitted, and then the constitutive model was simplified as an equation of density as the single independent variable. The comparisons between the theoretical and experimental mechanical behavior of RHPU grouting materials were discussed to illustrate the applicability of the hyperfoam constitutive model. Results show that with the increasing density, both the yield strength (σ 1 ), elastic modulus (E 1 ), and secant modulus (E s ) increases exponentially, and the Poisson's ratio (v) increases logarithmically. The maximum increase in σ 1 , E 1 , E s , and v are about 750%, 720%, 940%, and 50%, respectively. Compared to the effects of density on the mechanical properties, the effect of loading rate is much smaller, and the side length has no effect. For RHPU samples with a density not exceeding 0.35 g/cm 3 , the hyperfoam model can well describe the uniaxial compression mechanical behavior, but for those whose density exceeds 0.35 g/cm 3 , the model can only describe the mechanical behavior before yielding. The theoretical yield strength of the RHPU samples obtained from the model is close to the experimental value (with differences of about 0.1%-14.4%). This study provides a base to evaluate the compressive strength of the practically used RHPU grouting materials based on the density.

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“…16 However, the nanofiller dispersion and nanocomposite processability are major concerns. 17 Applications for the polyurethane/polystyrene blend-based nanocomposite include shape memory, selfhealing, membranes, and gas transport. 18 This review focuses on these unique class polyurethane/polystyrene nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Effect of nanofillers on polyurethane/polystyrene matrix nanocomposites: Characteristics and forthcoming developments

Kausar

2022

Journal of Plastic Film & Sheeting

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Polyurethane and polystyrene are significant thermoplastic polymers having unique physical properties. This article considers the research trials on the fabrication, remarkable features, and technical applications of the polyurethane/polystyrene nanocomposites. The carbonaceous nano particles and inorganic nanofillers used with the polyurethane/polystyrene blend or copolymer are carbon nanotube, graphene, nanoclay, silica nanoparticles, and others. The considerable improvements in the physical properties of the polyurethane/polystyrene blend may occur through the nanofiller addition. The physical or covalent interactions between the blend or copolymer components and nanofillers may also positively affect the nanocomposite properties. The fabrication strategies used for the polyurethane/polystyrene nanocomposites include solution method, in situ method, melt blending, and several nanocomposite processing approaches. The structure, morphology, electrical conductivity, thermal stability, mechanical strength, and several other physical properties of the high performance polyurethane/polystyrene nanocomposites have been explored. Major application areas identified are shape memory, membrane, and gas transport properties.

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Structural effects of dimensional nano-fillers on the properties of Sapium sebiferum oil-based polyurethane matrix: Experiments and molecular dynamics simulation

Cited by 12 publications

References 38 publications

Synthesis of Lightweight Renewable Microwave-Absorbing Bio-Polyurethane/Fe3O4 Composite Foam: Structure Analysis and Absorption Mechanism

Synthesis of Lightweight Renewable Microwave-Absorbing Bio-Polyurethane/Fe3O4 Composite Foam: Structure Analysis and Absorption Mechanism

Study of the mechanical properties and constitutive model of the roadbed rehabilitation polyurethane grouting materials under uniaxial compression

Effect of nanofillers on polyurethane/polystyrene matrix nanocomposites: Characteristics and forthcoming developments

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